Results 261 to 270 of about 37,573 (308)

Impact of long‐term sub‐soiling tillage on soil porosity and soil physical properties in the soil profile

Land Degradation & Development, 2021
AbstractLong‐term conventional tillage leads to soil compaction and formation of a plough layer, which affects soil physical properties, transport of water, and growth of crop roots toward deeper soil, resulting in soil degradation and a decline in crop productivity.
Yonghui Yang, Jicheng Wu, Shiwei Zhao, Yongping Mao, Jiemei Zhang, Xiaoying Pan, Fang He, Martine van der Ploeg   +7 more
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CP of Steel in Soil: Temporospatial pH and Oxygen Variation as a Function of Soil Porosity

CORROSION 2021, 2021
Abstract This paper documents an investigation of pH variations in water saturated sandy soil with steel samples under impressed current cathodic protection (CP). The aim of this work was to evaluate the temporal and spatial variation in pH and oxygen under different protection current density and different soil porosity ...
Martinelli-Orlando, Federico, Angst, Ueli   +1 more
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Predicting Porosity of Fired Soil Aggregates

Journal of Transportation Engineering, 1984
The porosity of preformed fired soil aggregates for pores larger than 0.05 μm in radius (POR), which mainly determines the potential of bitumen absorption, cannot be successfully correlated to a single soil property. Multiple regression analysis shows a significant correlation of aggregate porosity POR with the following soil parameters: diameter ...
Alamgir M. Hoque, Jose G. Cabrera
openaire   +1 more source

Soil Gas Permeability as Influenced by Soil Gas‐Filled Porosity

Soil Science Society of America Journal, 1992
Abstract The need to characterize the fundamental gas flow properties of soils has taken on new significance in recent years with the advent of induced soil venting as a remediation technique for contaminated soils.
Kevin P. McCarthy, Kirk W. Brown
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CHANGES IN SOIL POROSITY IN REMOLDED SOILS TREATED WITH POULTRY MANURE

Soil Science, 1987
We studied the modification induced in soil porosity, pore shape, and pore-size distribution in three soils of different textures treated with a poultry manure in laboratory trials, and we tested the effect of wetting and drying cycles. Porosity measurements were carried out on soil thin sections by using the electrooptical image-analysis (Quantimet ...
M. PAGLIAI, M. LA MARCA, G. LUCAMANTE
openaire   +1 more source

Porosity and soil water properties of Caribbean volcanic ash soils

Soil Use and Management, 2000
Abstract. Volcanic ash soils are generally recognized as soils with excellent and stable physical properties. Here we characterized the porosity and water properties of volcanic ash Andosols and Nitisols from Guadeloupe in contrasting banana systems: (1) perennial crop without mechanization, (2) mechanized and ...
Dorel, M., Roger-Estrade, J., Manichon, H., Delvaux, Bruno   +3 more
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Soil Hardness Measurements in Relation to Soil Moisture Content and Porosity

Soil Science Society of America Journal, 1952
Abstract A method of adjusting penetrometer measurements so as to express soil porosity conditions is presented. The best simple function giving high correlations with macroporosity in the Decatur clay and the sandy clay subsoil of Greenville fine sandy loam was log (ϑH 1/2 )
V. C. Jamison, H. A. Weaver
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Porosity and Soil‐Water Diffusivity Relations

Soil Science Society of America Journal, 1963
Abstract Water at −2mb pressure was absorbed by horizontal columns of three soil materials of differing texture each at three porosities, each porosity in duplicate. The soil materials were Adelanto loam, Pachappa loam, and Pine silty clay.
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Influence of soil porosity on water use in Pinus taeda

Oecologia, 2000
We analyzed the hydraulic constraints imposed on water uptake from soils of different porosities in loblolly pine (Pinus taeda L.) by comparing genetically related and even-aged plantations growing in loam versus sand soil. Water use was evaluated relative to the maximum transpiration rate (E crit) allowed by the soil-leaf continuum.
U G, Hacke, J S, Sperry, B E, Ewers, D S, Ellsworth, K V R, Schäfer, R, Oren   +5 more
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The porosity of soil aggregates from bulk soil and from soil adhering to roots

Plant and Soil, 1985
Total porosity and pore-size distribution (p.s.d.) were determined in soil aggregates taken in plots planted with maize and treated with farmyard manure and three rates of compost. Soil aggregates were collected from the soil adherent to the maize roots (root soil aggregates) and from bulk soil (bulk soil aggregates).
G. Guidi, G. Poggio, G. Petruzzelli
openaire   +1 more source